Surah Taha, verse 60

فَلَنَأْتِيَنَّكَ بِسِحْرٍۢ مِّثْلِهِۦ فَٱجْعَلْ بَيْنَنَا وَبَيْنَكَ مَوْعِدًۭا لَّا نُخْلِفُهُۥ نَحْنُ وَلَآ أَنتَ مَكَانًۭا سُوًۭى ﴿٥٨﴾

Then we will surely bring you magic like it, so make between us and you an appointment, which we will not fail to keep and neither will you, in a place assigned."

قَالَ مَوْعِدُكُمْ يَوْمُ ٱلزِّينَةِ وَأَن يُحْشَرَ ٱلنَّاسُ ضُحًۭى ﴿٥٩﴾

[Moses] said, "Your appointment is on the day of the festival when the people assemble at mid-morning."

قَالَ لَهُم مُّوسَىٰ وَيْلَكُمْ لَا تَفْتَرُوا۟ عَلَى ٱللَّهِ كَذِبًۭا فَيُسْحِتَكُم بِعَذَابٍۢ ۖ وَقَدْ خَابَ مَنِ ٱفْتَرَىٰ ﴿٦١﴾

Moses said to them [i.e., the magicians summoned by Pharaoh], "Woe to you! Do not invent a lie against Allāh or He will exterminate you with a punishment; and he has failed who invents [such falsehood]."

فَتَنَـٰزَعُوٓا۟ أَمْرَهُم بَيْنَهُمْ وَأَسَرُّوا۟ ٱلنَّجْوَىٰ ﴿٦٢﴾

So they disputed over their affair among themselves and concealed their private conversation.